TMP01 Datasheet | Analog Devices

FEATURES - 55°C to +125°C (- 67°F to +257°F) operation ±1.0°C accuracy over temperature (typ) Temperature-proportional voltage output User-programmable temperature trip points User-programmable hysteresis 20 m A open-collector trip point outputs TTL/CMOS patible Single-supply operation (4.5 V to 13.2 V) PDIP, SOIC, and TO-99 packages APPLICATIONS Over/under temperature sensor and alarm Board-level temperature sensing Temperature controllers Electronic thermostats Thermal protection HVAC systems Industrial process control Remote sensors GENERAL DESCRIPTION The TMP01 is a temperature sensor that generates a voltage output proportional to absolute temperature and a control signal from one of two outputs when the device is either above or below a specific temperature range. Both the high/low temperature trip points and hysteresis (overshoot) band are determined by user-selected external resistors. For high volume production, these resistors are available on board. The TMP01 consists of a band gap voltage reference bined with a pair of matched parators. The reference provides both a constant 2.5 V output and a voltage proportional to absolute temperature (VPTAT) which has a precise temperature coefficient of 5 m V/K and is 1.49 V (nominal) at 25°C. The parators pare VPTAT with the externally set temperature trip points and generate an open-collector output signal when one of their respective thresholds has been exceeded. Low Power Programmable Temperature Controller TMP01 FUNCTIONAL BLOCK DIAGRAM TEMPERATURE VREF 1 2.5V SENSOR AND VOLTAGE SENSOR 8 V+ R1 REFERENCE SET 2 HIGH R2 SET 3 LOW WINDOW PARATOR 7 OVER 6 UNDER R3 GND 4 HYSTERESIS GENERATOR 5 VPTAT Figure 1. 00333-001 Hysteresis is also programmed by the external resistor chain and is determined by the total current drawn out of the 2.5 V reference. This current is mirrored and used to generate a hysteresis offset voltage of the appropriate polarity after a parator has been tripped. The...